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![Wenpeng Liang](/assets/img/avatar_default.png)
There are some space related issues, including spaces at the start of the line, before tabs, after open parenthesis and before close parenthesis. Signed-off-by: Wenpeng Liang <liangwenpeng@huawei.com> Signed-off-by: Weihang Li <liweihang@huawei.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
870 lines
23 KiB
C
870 lines
23 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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#include <linux/export.h>
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#include <linux/kref.h>
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#include <linux/list.h>
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#include <linux/mutex.h>
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#include <linux/phylink.h>
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#include <linux/property.h>
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#include <linux/rtnetlink.h>
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#include <linux/slab.h>
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#include "sfp.h"
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struct sfp_quirk {
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const char *vendor;
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const char *part;
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void (*modes)(const struct sfp_eeprom_id *id, unsigned long *modes);
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};
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/**
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* struct sfp_bus - internal representation of a sfp bus
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*/
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struct sfp_bus {
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/* private: */
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struct kref kref;
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struct list_head node;
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struct fwnode_handle *fwnode;
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const struct sfp_socket_ops *socket_ops;
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struct device *sfp_dev;
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struct sfp *sfp;
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const struct sfp_quirk *sfp_quirk;
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const struct sfp_upstream_ops *upstream_ops;
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void *upstream;
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struct phy_device *phydev;
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bool registered;
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bool started;
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};
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static void sfp_quirk_2500basex(const struct sfp_eeprom_id *id,
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unsigned long *modes)
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{
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phylink_set(modes, 2500baseX_Full);
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}
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static void sfp_quirk_ubnt_uf_instant(const struct sfp_eeprom_id *id,
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unsigned long *modes)
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{
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/* Ubiquiti U-Fiber Instant module claims that support all transceiver
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* types including 10G Ethernet which is not truth. So clear all claimed
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* modes and set only one mode which module supports: 1000baseX_Full.
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*/
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phylink_zero(modes);
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phylink_set(modes, 1000baseX_Full);
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}
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static const struct sfp_quirk sfp_quirks[] = {
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{
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// Alcatel Lucent G-010S-P can operate at 2500base-X, but
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// incorrectly report 2500MBd NRZ in their EEPROM
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.vendor = "ALCATELLUCENT",
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.part = "G010SP",
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.modes = sfp_quirk_2500basex,
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}, {
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// Alcatel Lucent G-010S-A can operate at 2500base-X, but
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// report 3.2GBd NRZ in their EEPROM
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.vendor = "ALCATELLUCENT",
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.part = "3FE46541AA",
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.modes = sfp_quirk_2500basex,
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}, {
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// Huawei MA5671A can operate at 2500base-X, but report 1.2GBd
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// NRZ in their EEPROM
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.vendor = "HUAWEI",
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.part = "MA5671A",
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.modes = sfp_quirk_2500basex,
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}, {
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.vendor = "UBNT",
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.part = "UF-INSTANT",
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.modes = sfp_quirk_ubnt_uf_instant,
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},
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};
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static size_t sfp_strlen(const char *str, size_t maxlen)
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{
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size_t size, i;
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/* Trailing characters should be filled with space chars */
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for (i = 0, size = 0; i < maxlen; i++)
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if (str[i] != ' ')
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size = i + 1;
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return size;
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}
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static bool sfp_match(const char *qs, const char *str, size_t len)
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{
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if (!qs)
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return true;
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if (strlen(qs) != len)
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return false;
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return !strncmp(qs, str, len);
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}
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static const struct sfp_quirk *sfp_lookup_quirk(const struct sfp_eeprom_id *id)
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{
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const struct sfp_quirk *q;
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unsigned int i;
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size_t vs, ps;
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vs = sfp_strlen(id->base.vendor_name, ARRAY_SIZE(id->base.vendor_name));
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ps = sfp_strlen(id->base.vendor_pn, ARRAY_SIZE(id->base.vendor_pn));
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for (i = 0, q = sfp_quirks; i < ARRAY_SIZE(sfp_quirks); i++, q++)
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if (sfp_match(q->vendor, id->base.vendor_name, vs) &&
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sfp_match(q->part, id->base.vendor_pn, ps))
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return q;
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return NULL;
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}
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/**
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* sfp_parse_port() - Parse the EEPROM base ID, setting the port type
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* @bus: a pointer to the &struct sfp_bus structure for the sfp module
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* @id: a pointer to the module's &struct sfp_eeprom_id
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* @support: optional pointer to an array of unsigned long for the
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* ethtool support mask
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*
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* Parse the EEPROM identification given in @id, and return one of
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* %PORT_TP, %PORT_FIBRE or %PORT_OTHER. If @support is non-%NULL,
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* also set the ethtool %ETHTOOL_LINK_MODE_xxx_BIT corresponding with
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* the connector type.
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*
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* If the port type is not known, returns %PORT_OTHER.
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*/
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int sfp_parse_port(struct sfp_bus *bus, const struct sfp_eeprom_id *id,
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unsigned long *support)
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{
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int port;
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/* port is the physical connector, set this from the connector field. */
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switch (id->base.connector) {
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case SFF8024_CONNECTOR_SC:
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case SFF8024_CONNECTOR_FIBERJACK:
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case SFF8024_CONNECTOR_LC:
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case SFF8024_CONNECTOR_MT_RJ:
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case SFF8024_CONNECTOR_MU:
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case SFF8024_CONNECTOR_OPTICAL_PIGTAIL:
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case SFF8024_CONNECTOR_MPO_1X12:
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case SFF8024_CONNECTOR_MPO_2X16:
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port = PORT_FIBRE;
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break;
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case SFF8024_CONNECTOR_RJ45:
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port = PORT_TP;
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break;
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case SFF8024_CONNECTOR_COPPER_PIGTAIL:
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port = PORT_DA;
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break;
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case SFF8024_CONNECTOR_UNSPEC:
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if (id->base.e1000_base_t) {
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port = PORT_TP;
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break;
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}
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fallthrough;
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case SFF8024_CONNECTOR_SG: /* guess */
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case SFF8024_CONNECTOR_HSSDC_II:
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case SFF8024_CONNECTOR_NOSEPARATE:
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case SFF8024_CONNECTOR_MXC_2X16:
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port = PORT_OTHER;
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break;
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default:
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dev_warn(bus->sfp_dev, "SFP: unknown connector id 0x%02x\n",
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id->base.connector);
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port = PORT_OTHER;
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break;
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}
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if (support) {
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switch (port) {
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case PORT_FIBRE:
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phylink_set(support, FIBRE);
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break;
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case PORT_TP:
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phylink_set(support, TP);
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break;
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}
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}
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return port;
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}
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EXPORT_SYMBOL_GPL(sfp_parse_port);
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/**
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* sfp_may_have_phy() - indicate whether the module may have a PHY
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* @bus: a pointer to the &struct sfp_bus structure for the sfp module
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* @id: a pointer to the module's &struct sfp_eeprom_id
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*
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* Parse the EEPROM identification given in @id, and return whether
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* this module may have a PHY.
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*/
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bool sfp_may_have_phy(struct sfp_bus *bus, const struct sfp_eeprom_id *id)
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{
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if (id->base.e1000_base_t)
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return true;
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if (id->base.phys_id != SFF8024_ID_DWDM_SFP) {
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switch (id->base.extended_cc) {
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case SFF8024_ECC_10GBASE_T_SFI:
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case SFF8024_ECC_10GBASE_T_SR:
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case SFF8024_ECC_5GBASE_T:
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case SFF8024_ECC_2_5GBASE_T:
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return true;
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}
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}
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return false;
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}
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EXPORT_SYMBOL_GPL(sfp_may_have_phy);
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/**
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* sfp_parse_support() - Parse the eeprom id for supported link modes
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* @bus: a pointer to the &struct sfp_bus structure for the sfp module
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* @id: a pointer to the module's &struct sfp_eeprom_id
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* @support: pointer to an array of unsigned long for the ethtool support mask
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*
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* Parse the EEPROM identification information and derive the supported
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* ethtool link modes for the module.
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*/
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void sfp_parse_support(struct sfp_bus *bus, const struct sfp_eeprom_id *id,
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unsigned long *support)
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{
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unsigned int br_min, br_nom, br_max;
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__ETHTOOL_DECLARE_LINK_MODE_MASK(modes) = { 0, };
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/* Decode the bitrate information to MBd */
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br_min = br_nom = br_max = 0;
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if (id->base.br_nominal) {
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if (id->base.br_nominal != 255) {
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br_nom = id->base.br_nominal * 100;
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br_min = br_nom - id->base.br_nominal * id->ext.br_min;
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br_max = br_nom + id->base.br_nominal * id->ext.br_max;
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} else if (id->ext.br_max) {
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br_nom = 250 * id->ext.br_max;
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br_max = br_nom + br_nom * id->ext.br_min / 100;
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br_min = br_nom - br_nom * id->ext.br_min / 100;
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}
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/* When using passive cables, in case neither BR,min nor BR,max
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* are specified, set br_min to 0 as the nominal value is then
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* used as the maximum.
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*/
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if (br_min == br_max && id->base.sfp_ct_passive)
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br_min = 0;
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}
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/* Set ethtool support from the compliance fields. */
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if (id->base.e10g_base_sr)
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phylink_set(modes, 10000baseSR_Full);
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if (id->base.e10g_base_lr)
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phylink_set(modes, 10000baseLR_Full);
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if (id->base.e10g_base_lrm)
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phylink_set(modes, 10000baseLRM_Full);
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if (id->base.e10g_base_er)
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phylink_set(modes, 10000baseER_Full);
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if (id->base.e1000_base_sx ||
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id->base.e1000_base_lx ||
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id->base.e1000_base_cx)
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phylink_set(modes, 1000baseX_Full);
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if (id->base.e1000_base_t) {
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phylink_set(modes, 1000baseT_Half);
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phylink_set(modes, 1000baseT_Full);
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}
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/* 1000Base-PX or 1000Base-BX10 */
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if ((id->base.e_base_px || id->base.e_base_bx10) &&
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br_min <= 1300 && br_max >= 1200)
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phylink_set(modes, 1000baseX_Full);
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/* 100Base-FX, 100Base-LX, 100Base-PX, 100Base-BX10 */
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if (id->base.e100_base_fx || id->base.e100_base_lx)
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phylink_set(modes, 100baseFX_Full);
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if ((id->base.e_base_px || id->base.e_base_bx10) && br_nom == 100)
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phylink_set(modes, 100baseFX_Full);
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/* For active or passive cables, select the link modes
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* based on the bit rates and the cable compliance bytes.
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*/
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if ((id->base.sfp_ct_passive || id->base.sfp_ct_active) && br_nom) {
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/* This may look odd, but some manufacturers use 12000MBd */
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if (br_min <= 12000 && br_max >= 10300)
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phylink_set(modes, 10000baseCR_Full);
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if (br_min <= 3200 && br_max >= 3100)
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phylink_set(modes, 2500baseX_Full);
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if (br_min <= 1300 && br_max >= 1200)
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phylink_set(modes, 1000baseX_Full);
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}
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if (id->base.sfp_ct_passive) {
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if (id->base.passive.sff8431_app_e)
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phylink_set(modes, 10000baseCR_Full);
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}
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if (id->base.sfp_ct_active) {
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if (id->base.active.sff8431_app_e ||
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id->base.active.sff8431_lim) {
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phylink_set(modes, 10000baseCR_Full);
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}
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}
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switch (id->base.extended_cc) {
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case SFF8024_ECC_UNSPEC:
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break;
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case SFF8024_ECC_100GBASE_SR4_25GBASE_SR:
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phylink_set(modes, 100000baseSR4_Full);
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phylink_set(modes, 25000baseSR_Full);
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break;
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case SFF8024_ECC_100GBASE_LR4_25GBASE_LR:
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case SFF8024_ECC_100GBASE_ER4_25GBASE_ER:
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phylink_set(modes, 100000baseLR4_ER4_Full);
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break;
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case SFF8024_ECC_100GBASE_CR4:
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phylink_set(modes, 100000baseCR4_Full);
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fallthrough;
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case SFF8024_ECC_25GBASE_CR_S:
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case SFF8024_ECC_25GBASE_CR_N:
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phylink_set(modes, 25000baseCR_Full);
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break;
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case SFF8024_ECC_10GBASE_T_SFI:
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case SFF8024_ECC_10GBASE_T_SR:
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phylink_set(modes, 10000baseT_Full);
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break;
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case SFF8024_ECC_5GBASE_T:
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phylink_set(modes, 5000baseT_Full);
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break;
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case SFF8024_ECC_2_5GBASE_T:
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phylink_set(modes, 2500baseT_Full);
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break;
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default:
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dev_warn(bus->sfp_dev,
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"Unknown/unsupported extended compliance code: 0x%02x\n",
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id->base.extended_cc);
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break;
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}
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/* For fibre channel SFP, derive possible BaseX modes */
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if (id->base.fc_speed_100 ||
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id->base.fc_speed_200 ||
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id->base.fc_speed_400) {
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if (id->base.br_nominal >= 31)
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phylink_set(modes, 2500baseX_Full);
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if (id->base.br_nominal >= 12)
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phylink_set(modes, 1000baseX_Full);
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}
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/* If we haven't discovered any modes that this module supports, try
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* the bitrate to determine supported modes. Some BiDi modules (eg,
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* 1310nm/1550nm) are not 1000BASE-BX compliant due to the differing
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* wavelengths, so do not set any transceiver bits.
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*
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* Do the same for modules supporting 2500BASE-X. Note that some
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* modules use 2500Mbaud rather than 3100 or 3200Mbaud for
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* 2500BASE-X, so we allow some slack here.
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*/
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if (bitmap_empty(modes, __ETHTOOL_LINK_MODE_MASK_NBITS) && br_nom) {
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if (br_min <= 1300 && br_max >= 1200)
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phylink_set(modes, 1000baseX_Full);
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if (br_min <= 3200 && br_max >= 2500)
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phylink_set(modes, 2500baseX_Full);
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}
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if (bus->sfp_quirk)
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bus->sfp_quirk->modes(id, modes);
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bitmap_or(support, support, modes, __ETHTOOL_LINK_MODE_MASK_NBITS);
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phylink_set(support, Autoneg);
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phylink_set(support, Pause);
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phylink_set(support, Asym_Pause);
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}
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EXPORT_SYMBOL_GPL(sfp_parse_support);
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/**
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* sfp_select_interface() - Select appropriate phy_interface_t mode
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* @bus: a pointer to the &struct sfp_bus structure for the sfp module
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* @link_modes: ethtool link modes mask
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*
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* Derive the phy_interface_t mode for the SFP module from the link
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* modes mask.
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*/
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phy_interface_t sfp_select_interface(struct sfp_bus *bus,
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unsigned long *link_modes)
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{
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if (phylink_test(link_modes, 25000baseCR_Full) ||
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phylink_test(link_modes, 25000baseKR_Full) ||
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phylink_test(link_modes, 25000baseSR_Full))
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return PHY_INTERFACE_MODE_25GBASER;
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if (phylink_test(link_modes, 10000baseCR_Full) ||
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phylink_test(link_modes, 10000baseSR_Full) ||
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phylink_test(link_modes, 10000baseLR_Full) ||
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phylink_test(link_modes, 10000baseLRM_Full) ||
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phylink_test(link_modes, 10000baseER_Full) ||
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phylink_test(link_modes, 10000baseT_Full))
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return PHY_INTERFACE_MODE_10GBASER;
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if (phylink_test(link_modes, 5000baseT_Full))
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return PHY_INTERFACE_MODE_5GBASER;
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if (phylink_test(link_modes, 2500baseX_Full))
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return PHY_INTERFACE_MODE_2500BASEX;
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if (phylink_test(link_modes, 1000baseT_Half) ||
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phylink_test(link_modes, 1000baseT_Full))
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return PHY_INTERFACE_MODE_SGMII;
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if (phylink_test(link_modes, 1000baseX_Full))
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return PHY_INTERFACE_MODE_1000BASEX;
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if (phylink_test(link_modes, 100baseFX_Full))
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return PHY_INTERFACE_MODE_100BASEX;
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dev_warn(bus->sfp_dev, "Unable to ascertain link mode\n");
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return PHY_INTERFACE_MODE_NA;
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}
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EXPORT_SYMBOL_GPL(sfp_select_interface);
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static LIST_HEAD(sfp_buses);
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static DEFINE_MUTEX(sfp_mutex);
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static const struct sfp_upstream_ops *sfp_get_upstream_ops(struct sfp_bus *bus)
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{
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return bus->registered ? bus->upstream_ops : NULL;
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}
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static struct sfp_bus *sfp_bus_get(struct fwnode_handle *fwnode)
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{
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struct sfp_bus *sfp, *new, *found = NULL;
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new = kzalloc(sizeof(*new), GFP_KERNEL);
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mutex_lock(&sfp_mutex);
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list_for_each_entry(sfp, &sfp_buses, node) {
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if (sfp->fwnode == fwnode) {
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kref_get(&sfp->kref);
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found = sfp;
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break;
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}
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}
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if (!found && new) {
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kref_init(&new->kref);
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new->fwnode = fwnode;
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list_add(&new->node, &sfp_buses);
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found = new;
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new = NULL;
|
|
}
|
|
|
|
mutex_unlock(&sfp_mutex);
|
|
|
|
kfree(new);
|
|
|
|
return found;
|
|
}
|
|
|
|
static void sfp_bus_release(struct kref *kref)
|
|
{
|
|
struct sfp_bus *bus = container_of(kref, struct sfp_bus, kref);
|
|
|
|
list_del(&bus->node);
|
|
mutex_unlock(&sfp_mutex);
|
|
kfree(bus);
|
|
}
|
|
|
|
/**
|
|
* sfp_bus_put() - put a reference on the &struct sfp_bus
|
|
* @bus: the &struct sfp_bus found via sfp_bus_find_fwnode()
|
|
*
|
|
* Put a reference on the &struct sfp_bus and free the underlying structure
|
|
* if this was the last reference.
|
|
*/
|
|
void sfp_bus_put(struct sfp_bus *bus)
|
|
{
|
|
if (bus)
|
|
kref_put_mutex(&bus->kref, sfp_bus_release, &sfp_mutex);
|
|
}
|
|
EXPORT_SYMBOL_GPL(sfp_bus_put);
|
|
|
|
static int sfp_register_bus(struct sfp_bus *bus)
|
|
{
|
|
const struct sfp_upstream_ops *ops = bus->upstream_ops;
|
|
int ret;
|
|
|
|
if (ops) {
|
|
if (ops->link_down)
|
|
ops->link_down(bus->upstream);
|
|
if (ops->connect_phy && bus->phydev) {
|
|
ret = ops->connect_phy(bus->upstream, bus->phydev);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
}
|
|
bus->registered = true;
|
|
bus->socket_ops->attach(bus->sfp);
|
|
if (bus->started)
|
|
bus->socket_ops->start(bus->sfp);
|
|
bus->upstream_ops->attach(bus->upstream, bus);
|
|
return 0;
|
|
}
|
|
|
|
static void sfp_unregister_bus(struct sfp_bus *bus)
|
|
{
|
|
const struct sfp_upstream_ops *ops = bus->upstream_ops;
|
|
|
|
if (bus->registered) {
|
|
bus->upstream_ops->detach(bus->upstream, bus);
|
|
if (bus->started)
|
|
bus->socket_ops->stop(bus->sfp);
|
|
bus->socket_ops->detach(bus->sfp);
|
|
if (bus->phydev && ops && ops->disconnect_phy)
|
|
ops->disconnect_phy(bus->upstream);
|
|
}
|
|
bus->registered = false;
|
|
}
|
|
|
|
/**
|
|
* sfp_get_module_info() - Get the ethtool_modinfo for a SFP module
|
|
* @bus: a pointer to the &struct sfp_bus structure for the sfp module
|
|
* @modinfo: a &struct ethtool_modinfo
|
|
*
|
|
* Fill in the type and eeprom_len parameters in @modinfo for a module on
|
|
* the sfp bus specified by @bus.
|
|
*
|
|
* Returns 0 on success or a negative errno number.
|
|
*/
|
|
int sfp_get_module_info(struct sfp_bus *bus, struct ethtool_modinfo *modinfo)
|
|
{
|
|
return bus->socket_ops->module_info(bus->sfp, modinfo);
|
|
}
|
|
EXPORT_SYMBOL_GPL(sfp_get_module_info);
|
|
|
|
/**
|
|
* sfp_get_module_eeprom() - Read the SFP module EEPROM
|
|
* @bus: a pointer to the &struct sfp_bus structure for the sfp module
|
|
* @ee: a &struct ethtool_eeprom
|
|
* @data: buffer to contain the EEPROM data (must be at least @ee->len bytes)
|
|
*
|
|
* Read the EEPROM as specified by the supplied @ee. See the documentation
|
|
* for &struct ethtool_eeprom for the region to be read.
|
|
*
|
|
* Returns 0 on success or a negative errno number.
|
|
*/
|
|
int sfp_get_module_eeprom(struct sfp_bus *bus, struct ethtool_eeprom *ee,
|
|
u8 *data)
|
|
{
|
|
return bus->socket_ops->module_eeprom(bus->sfp, ee, data);
|
|
}
|
|
EXPORT_SYMBOL_GPL(sfp_get_module_eeprom);
|
|
|
|
/**
|
|
* sfp_get_module_eeprom_by_page() - Read a page from the SFP module EEPROM
|
|
* @bus: a pointer to the &struct sfp_bus structure for the sfp module
|
|
* @page: a &struct ethtool_module_eeprom
|
|
* @extack: extack for reporting problems
|
|
*
|
|
* Read an EEPROM page as specified by the supplied @page. See the
|
|
* documentation for &struct ethtool_module_eeprom for the page to be read.
|
|
*
|
|
* Returns 0 on success or a negative errno number. More error
|
|
* information might be provided via extack
|
|
*/
|
|
int sfp_get_module_eeprom_by_page(struct sfp_bus *bus,
|
|
const struct ethtool_module_eeprom *page,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
return bus->socket_ops->module_eeprom_by_page(bus->sfp, page, extack);
|
|
}
|
|
EXPORT_SYMBOL_GPL(sfp_get_module_eeprom_by_page);
|
|
|
|
/**
|
|
* sfp_upstream_start() - Inform the SFP that the network device is up
|
|
* @bus: a pointer to the &struct sfp_bus structure for the sfp module
|
|
*
|
|
* Inform the SFP socket that the network device is now up, so that the
|
|
* module can be enabled by allowing TX_DISABLE to be deasserted. This
|
|
* should be called from the network device driver's &struct net_device_ops
|
|
* ndo_open() method.
|
|
*/
|
|
void sfp_upstream_start(struct sfp_bus *bus)
|
|
{
|
|
if (bus->registered)
|
|
bus->socket_ops->start(bus->sfp);
|
|
bus->started = true;
|
|
}
|
|
EXPORT_SYMBOL_GPL(sfp_upstream_start);
|
|
|
|
/**
|
|
* sfp_upstream_stop() - Inform the SFP that the network device is down
|
|
* @bus: a pointer to the &struct sfp_bus structure for the sfp module
|
|
*
|
|
* Inform the SFP socket that the network device is now up, so that the
|
|
* module can be disabled by asserting TX_DISABLE, disabling the laser
|
|
* in optical modules. This should be called from the network device
|
|
* driver's &struct net_device_ops ndo_stop() method.
|
|
*/
|
|
void sfp_upstream_stop(struct sfp_bus *bus)
|
|
{
|
|
if (bus->registered)
|
|
bus->socket_ops->stop(bus->sfp);
|
|
bus->started = false;
|
|
}
|
|
EXPORT_SYMBOL_GPL(sfp_upstream_stop);
|
|
|
|
static void sfp_upstream_clear(struct sfp_bus *bus)
|
|
{
|
|
bus->upstream_ops = NULL;
|
|
bus->upstream = NULL;
|
|
}
|
|
|
|
/**
|
|
* sfp_bus_find_fwnode() - parse and locate the SFP bus from fwnode
|
|
* @fwnode: firmware node for the parent device (MAC or PHY)
|
|
*
|
|
* Parse the parent device's firmware node for a SFP bus, and locate
|
|
* the sfp_bus structure, incrementing its reference count. This must
|
|
* be put via sfp_bus_put() when done.
|
|
*
|
|
* Returns:
|
|
* - on success, a pointer to the sfp_bus structure,
|
|
* - %NULL if no SFP is specified,
|
|
* - on failure, an error pointer value:
|
|
*
|
|
* - corresponding to the errors detailed for
|
|
* fwnode_property_get_reference_args().
|
|
* - %-ENOMEM if we failed to allocate the bus.
|
|
* - an error from the upstream's connect_phy() method.
|
|
*/
|
|
struct sfp_bus *sfp_bus_find_fwnode(struct fwnode_handle *fwnode)
|
|
{
|
|
struct fwnode_reference_args ref;
|
|
struct sfp_bus *bus;
|
|
int ret;
|
|
|
|
ret = fwnode_property_get_reference_args(fwnode, "sfp", NULL,
|
|
0, 0, &ref);
|
|
if (ret == -ENOENT)
|
|
return NULL;
|
|
else if (ret < 0)
|
|
return ERR_PTR(ret);
|
|
|
|
bus = sfp_bus_get(ref.fwnode);
|
|
fwnode_handle_put(ref.fwnode);
|
|
if (!bus)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
return bus;
|
|
}
|
|
EXPORT_SYMBOL_GPL(sfp_bus_find_fwnode);
|
|
|
|
/**
|
|
* sfp_bus_add_upstream() - parse and register the neighbouring device
|
|
* @bus: the &struct sfp_bus found via sfp_bus_find_fwnode()
|
|
* @upstream: the upstream private data
|
|
* @ops: the upstream's &struct sfp_upstream_ops
|
|
*
|
|
* Add upstream driver for the SFP bus, and if the bus is complete, register
|
|
* the SFP bus using sfp_register_upstream(). This takes a reference on the
|
|
* bus, so it is safe to put the bus after this call.
|
|
*
|
|
* Returns:
|
|
* - on success, a pointer to the sfp_bus structure,
|
|
* - %NULL if no SFP is specified,
|
|
* - on failure, an error pointer value:
|
|
*
|
|
* - corresponding to the errors detailed for
|
|
* fwnode_property_get_reference_args().
|
|
* - %-ENOMEM if we failed to allocate the bus.
|
|
* - an error from the upstream's connect_phy() method.
|
|
*/
|
|
int sfp_bus_add_upstream(struct sfp_bus *bus, void *upstream,
|
|
const struct sfp_upstream_ops *ops)
|
|
{
|
|
int ret;
|
|
|
|
/* If no bus, return success */
|
|
if (!bus)
|
|
return 0;
|
|
|
|
rtnl_lock();
|
|
kref_get(&bus->kref);
|
|
bus->upstream_ops = ops;
|
|
bus->upstream = upstream;
|
|
|
|
if (bus->sfp) {
|
|
ret = sfp_register_bus(bus);
|
|
if (ret)
|
|
sfp_upstream_clear(bus);
|
|
} else {
|
|
ret = 0;
|
|
}
|
|
rtnl_unlock();
|
|
|
|
if (ret)
|
|
sfp_bus_put(bus);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(sfp_bus_add_upstream);
|
|
|
|
/**
|
|
* sfp_bus_del_upstream() - Delete a sfp bus
|
|
* @bus: a pointer to the &struct sfp_bus structure for the sfp module
|
|
*
|
|
* Delete a previously registered upstream connection for the SFP
|
|
* module. @bus should have been added by sfp_bus_add_upstream().
|
|
*/
|
|
void sfp_bus_del_upstream(struct sfp_bus *bus)
|
|
{
|
|
if (bus) {
|
|
rtnl_lock();
|
|
if (bus->sfp)
|
|
sfp_unregister_bus(bus);
|
|
sfp_upstream_clear(bus);
|
|
rtnl_unlock();
|
|
|
|
sfp_bus_put(bus);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL_GPL(sfp_bus_del_upstream);
|
|
|
|
/* Socket driver entry points */
|
|
int sfp_add_phy(struct sfp_bus *bus, struct phy_device *phydev)
|
|
{
|
|
const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus);
|
|
int ret = 0;
|
|
|
|
if (ops && ops->connect_phy)
|
|
ret = ops->connect_phy(bus->upstream, phydev);
|
|
|
|
if (ret == 0)
|
|
bus->phydev = phydev;
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(sfp_add_phy);
|
|
|
|
void sfp_remove_phy(struct sfp_bus *bus)
|
|
{
|
|
const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus);
|
|
|
|
if (ops && ops->disconnect_phy)
|
|
ops->disconnect_phy(bus->upstream);
|
|
bus->phydev = NULL;
|
|
}
|
|
EXPORT_SYMBOL_GPL(sfp_remove_phy);
|
|
|
|
void sfp_link_up(struct sfp_bus *bus)
|
|
{
|
|
const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus);
|
|
|
|
if (ops && ops->link_up)
|
|
ops->link_up(bus->upstream);
|
|
}
|
|
EXPORT_SYMBOL_GPL(sfp_link_up);
|
|
|
|
void sfp_link_down(struct sfp_bus *bus)
|
|
{
|
|
const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus);
|
|
|
|
if (ops && ops->link_down)
|
|
ops->link_down(bus->upstream);
|
|
}
|
|
EXPORT_SYMBOL_GPL(sfp_link_down);
|
|
|
|
int sfp_module_insert(struct sfp_bus *bus, const struct sfp_eeprom_id *id)
|
|
{
|
|
const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus);
|
|
int ret = 0;
|
|
|
|
bus->sfp_quirk = sfp_lookup_quirk(id);
|
|
|
|
if (ops && ops->module_insert)
|
|
ret = ops->module_insert(bus->upstream, id);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(sfp_module_insert);
|
|
|
|
void sfp_module_remove(struct sfp_bus *bus)
|
|
{
|
|
const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus);
|
|
|
|
if (ops && ops->module_remove)
|
|
ops->module_remove(bus->upstream);
|
|
|
|
bus->sfp_quirk = NULL;
|
|
}
|
|
EXPORT_SYMBOL_GPL(sfp_module_remove);
|
|
|
|
int sfp_module_start(struct sfp_bus *bus)
|
|
{
|
|
const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus);
|
|
int ret = 0;
|
|
|
|
if (ops && ops->module_start)
|
|
ret = ops->module_start(bus->upstream);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(sfp_module_start);
|
|
|
|
void sfp_module_stop(struct sfp_bus *bus)
|
|
{
|
|
const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus);
|
|
|
|
if (ops && ops->module_stop)
|
|
ops->module_stop(bus->upstream);
|
|
}
|
|
EXPORT_SYMBOL_GPL(sfp_module_stop);
|
|
|
|
static void sfp_socket_clear(struct sfp_bus *bus)
|
|
{
|
|
bus->sfp_dev = NULL;
|
|
bus->sfp = NULL;
|
|
bus->socket_ops = NULL;
|
|
}
|
|
|
|
struct sfp_bus *sfp_register_socket(struct device *dev, struct sfp *sfp,
|
|
const struct sfp_socket_ops *ops)
|
|
{
|
|
struct sfp_bus *bus = sfp_bus_get(dev->fwnode);
|
|
int ret = 0;
|
|
|
|
if (bus) {
|
|
rtnl_lock();
|
|
bus->sfp_dev = dev;
|
|
bus->sfp = sfp;
|
|
bus->socket_ops = ops;
|
|
|
|
if (bus->upstream_ops) {
|
|
ret = sfp_register_bus(bus);
|
|
if (ret)
|
|
sfp_socket_clear(bus);
|
|
}
|
|
rtnl_unlock();
|
|
}
|
|
|
|
if (ret) {
|
|
sfp_bus_put(bus);
|
|
bus = NULL;
|
|
}
|
|
|
|
return bus;
|
|
}
|
|
EXPORT_SYMBOL_GPL(sfp_register_socket);
|
|
|
|
void sfp_unregister_socket(struct sfp_bus *bus)
|
|
{
|
|
rtnl_lock();
|
|
if (bus->upstream_ops)
|
|
sfp_unregister_bus(bus);
|
|
sfp_socket_clear(bus);
|
|
rtnl_unlock();
|
|
|
|
sfp_bus_put(bus);
|
|
}
|
|
EXPORT_SYMBOL_GPL(sfp_unregister_socket);
|